Crypto currency has a greater future no doubt and we have already seen it since the inseption of Bitcoin in 2009 ehen its value was below a dollar and now above $8,500 as at time of this post.
Cryptocurrency will grow even further in the future and because of that we can expect more profit in the future, the price of bitcoins is expected to reach $50k dollar at the end of 2018 so better wait for it to happen before selling all your coins.